Locomotive boiler



.July 14, 1931. c.w. LESTER 1 1,813,939

LOCOMOTIVE BOILER l Filed June 26, 1928 ssn'eets-sheet 1 July.l 4, 1931. c. w. LESTER LOCOMOTIVES BOILER Filed June, 26, 1928 3 Sheets-Sheet 2 WITNESSES nbcouonvn BOILER- Filed June 26, 1928 SSheets-Sheet a mvpsmoa Char/es MLLesfen oRNEY Patented July 14, 1931 UNITED STATES PATENT OFFICE CHARLES W. LESTER, OF SCHENECTADY, NEW YORK LOGOMOTIVE BOILER Application filed June 26,

This invention relates, generally, to locomotive boilers of the water tube firebox type, and particularly to the means for effecting water circulation between the waist of the boiler and the firebox, and affording support to the grate, in locomotive boilers of such The object of the invention is to provide a simple, rigid and inexpensive structure for carrying out the purpose of the means above recited, the application of which can be readilymade in the construction of locomotive boilers of the type to which the invention relates, with the resultant substantial practical advantages of the elimination of riveted joints, back head staybolts, studded connections, and built up waist and throat circulating passages. 'The invention is further designed to afford facilities for the support of A view of the lower portion of Fig. 6.

" grate side frames, centre frames, and dead grates, without requiring separate brackets and their accessories, and to provide for the direct application of grate bars, with accuracy, and without involving extended machine work. I a.

The improvement claimed is hereinafter fully set forth. i x

In the accompanying drawings: Figure 1 is a view, in side elevation with "the firebox casing removed, of the rear portion of a comotive boiler, illustrating an application of the invention; Fig. 2, a plan or top'view of the major portion of a structure embodying the invention; Fig. 3, a vertical longitudi-,

nal section, on the line a a of Fig. 2;.Fig. 4,

aview, in elevation, of the middle portion of the back head; Fig. 5, a front view, in elevation; Fig. 6, a transverse section on the line VIVI of Fig. 1; and Fig. 7 an enlarged In the practice of the invention, referring descriptively to the specific embodiment thereof which is herein exemplified, the members constituting such embodiment are comprehended in an integral structure, the form and functions of which are as hereinafter de scribed. The rear and main portion is rectangular, and comprises ahollow mud ring, 1, at its bottom, which extends throughout the length of its front, rear, and sides; grate sup- 1928. Serial No. 288,413.

porting plates, 2, located at the top of the mud ring and a longitudinal centre plate, 3, connecting the front and rear members of the mud ring, at the middle thereof; and a hollow back head, 4:, extending upwardly from the rear member of the mud ring, said head having a fire door opening, 4d, at its middle and near its top, at which ahollow trans verse member, 4?), is located. The mud ring is adapted for the connection of the side water tubes, 5, of the firebox, to its top, and the transverse member, 4?), of the back head is similarly adapted for the connection of the watertubes thereof that are disposed above it. It is to be noted that the mud ring 1, terminates at the front end of the firebox,and that the ribbed casting and its water circulation channel or groove 6 extends throughout the length of the combustion chamber 9, and

beneath the rear end of the fire tube section of which is strengthened by peripheral ribs, 6a, 7 i

extends forwardly from the front member of the mud ring,'at the middle, thereof, said passage being open at its top to the water space of the waist, 7, of the boiler, the wall of said passage having a laterally extending front plate, 6b, at its forward end,. a'nd a similarly extending rear plate, 60, at its rear end. The plates,.6b and 6c, are curved to the radius of the shell of the boiler, against which they are adapted to fit. Lateral circulation pipes, 8, lead from openings, 6d, in the front plate, 6?), to the front member of the hollow mud ring,l.

In the present construction of locomotive boilers of the type to which the invention relates', separate outside water circulating pipes are required to beattached to the shell of the boiler and to the corners ofthe'mud ring,

through studded flanges and ball joints. In the structure of the present invention, these sources of leakage and stud breakage, due to working strains in service, are eliminated. The provision of a connecting member in tegral with the firebox mud ring, obviates the necessity of the use of fianged plates and staybolted surfaces, :thereby affording direct, ready, and accurate application to the shell of the boiler.

The invention ;claimed"and desired .toihe secured by Letters Patent is:

1. A structure for locomotive boilers,'comprising a mud ring embodying a water circulation passageway; a member extending forwardly ofthe mud ring-andihavinga longitudinal groovecommunicating with-*the passagewayin themud ring; and a conduit disposed outside of the groove and connected at one end to the grooved member and at its other end to the mud ring.

2. As a-newarticle.ofmanufacture for use with locomotive boilers, an integral structure comprising a mud :ring .embodying a water circulation passageway; amember extending forwardly of the mud :ring and having a longitudinal groove communicating with the passageway inthe mud ring; and a conduit disposed outside of the groove and connected at one end :to the forwardly extending member and at its other end to the mud ring.

3. In a locomotive boiler, the combination of a firebox; a fire tube boiler section;.a hollow rectangular mud rring atthe bottom of the firebox providing a water circulation passageway; a member directlyattached toand extending forwardly ofthe mudringv and beneath-the fire tubesection of the boiler, said member'havinga longitudinal groove extendingIbeneath the rear end of the fire tube boiler section affording uninterrupted communication'between the said fire tube boiler section and the mud ring; and a passageway disposed outside of the groove and communicating with the interior of the fire tubeboilersection and the. passageway in the mud ring.

4. A locomotive .boiler .comprising a fire box section; a combustion chamber section; and a fire tube boiler section, said sections being rigidly joined together by, and the upper parts thereof rigidly supportedupon, a rigid one piece integral casting, comprising, as a'rear portion, a mudring forming a part of the fire box section and supporting the upper parts of the fire box section, and having a transversely hollow front end, disposed at the front end of the 'fire box section, an intermediate :portion forming .part of the combustion chambersecti-on, supporting the upper parts of the combustion chamber section and cast integral with the rear'portio-n to rigidly secure together the fire box section and combustion chamber section, and a front portion forming part of the fire tube boiler section, supporting the upper parts of the rear end of the fire tube boiler section and cast integral with the intermediate portion to rigidly secure together the combustion chamber section and fire tube boiler section, said intermediate and front portions being provided with a longitudinal passageway connected at the rear end to the hollow front end of the mud ring, and connected at the front end to the rear end of the fire tube boiler section.

5. .A locomotive boiler comprising a fire box section; a combustion chamber section; and "a fire tube boiler section, said sections being rigidly joined together by, and the upperpartsthereof rigidly supported upon,

a rigid one piece integral casting, comprising, as a'rear portion a mud ring forming a part ofthe fire box section and supporting-the upperparts of the lire box section and having a transversely hollow front end, disposed at thefront end of the firebox section, an intermediate portion forming part of the combustion chamber section, supporting the upper parts of the combustion chamber sectiOIlz and cast integral with the rearportion to rigidly secure together :the fire box section and combustion chamber section, and a front portion forming part ofthe fire-tube boiler section, supporting the upper parts of the rearend of the fire tubeiboiler section and cast integral withthe intermediate portion to rigidly secure together thecombustion chamber section and fire tube b.oiler-section, said .intermediate and front portions beingprovided with a longitudinal passageway connected at the rear end to the hollow front end of the mud ring, connected at thevfront endto the rear'end of the fire tube boiler section, .and connectedintermediate the ends to'the combustion chamber section.

.6. .A locomotive boiler comprising a. fire box section; a water tubular combustion chamber section; and a firetube boiler'section, saidsections being rigidly joined together by, andthe upper parts thereof rigidly supported upon, a rigid one piece integral casting, comprising asa rear portion a mud ring forming a part of the firebox section and supporting the upper .parts of the fire box section and having a transversely hollow 'front end disposed :at the front end of the fire box section, an intermediate portion forming part ofthe combustion chamber section,.supporting. the upper parts ofthe combustion chamber section and cast integral with the rear portion to rigidly secure together the vfire box section and combustion chamber section, anda front port-ion forming part of thefire tube boiler section, supporting the upper parts of the rear end of the fire tube boiler section and cast integral with the intermediate portionto rigidly secure together the combustion chamber section and fire ltube boiler section, said intermediate and front portionsbeing provided with a longitudinal passageway connected at its rear end to the hollow front end of the mud ring, connected at the front end to the fire tube boiler section, and connected intermediate the ends with the water tubes of the combustion chamber.

7. A locomotive boiler comprising a fire box section; a combustion chamber section; and a fire tube boiler section, having a shell extending rearwardly to form part of the combustion chamber section, said sections be ing rigidly joined together by, and the upper parts thereof rigidly supported upon, a rigid one piece integral casting, comprising, as a rear portion a mud ring forming a part of the fire box section and supporting the upper parts of the fire box section, and having a transversely hollow front end disposed at the front end of the fire box section, an intermediate portion i'orming part of the combus-' tion chamber section, supporting the upper parts of the combustion chamber section and secured to said shell extension to afford additional support to said fire tube boiler section, and cast integral with the rear portion to rigidly secure together the fire box section and combustion chamber section, and a front portion forming part of the fire tube boiler section, secured to said shell and supporting the upper parts of the rear end of the fire tube boiler section and cast integral with the intermediate portion to rigidly secure together the combustion chamber section and fire tube boiler section, said intermediate and front portions being provided with a longitudinal passageway connected at the rear end to the hollow front end of the mud ring and connected at the front end to the rear end of the fire tube boiler section.

8. A locomotive boiler comprising a fire box section; a water tubular combustion chamber section; and a fire tube boiler section, having a shell extending rearwardly to form part of the combustion chambersection, said sections being rigidly joined together by, and the upper parts thereof rigidly supported upon, a rigid one piece integral casting, comprising, as a rear portion a mud ring forming a part of the fire box section and supporting the upper parts of the fire box section and havin a transversely hollow front end, disposed at the front end of the firebox section, an intermediate portion forming part of the combustion chamber section, supporting the upper parts of the combustion chamber section and secured to said shell extension to afford additional support to said fire tube boiler section and cast integral with the rear portion to rigidly secure together the fire box section and combustion chamber section, and a front portion forming part of the fire tube boiler section, secured to said shell of the rear end of the fire tube boiler section and cast integral with the intermediate portion to rigidly secure together the combustion chamber section and fire tube boiler section, said intermediate and front portions being provided with a longitudinal passageway having an open top closed by said shell, said passageway being connected at its rear end to the hollow front end of the mud ring, connected at the front end through said shell to the fire tube boiler section, and connected intermediate the ends through said shell extension with the water tubes of the combustion chamber section.

CHARLES W. LESTER. 

